Internet turns off

I recently went to the malware removal forum and went through the process. Everything seems to be going well, but my internet connection has turned off two days in a row around the same time. Both times it was late at night and when I checked my main computer to see what was wrong the anti phishing for my firewall was turned off(maybe the program is conflicting with the other program I have Web of trust). After all this happens the next morning my internet is completely fine. Is it just my internet provider or do I have to clean my pc again.